From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Charging switch and vibrator regulator performance and modifications.
| Identifier | ExFiles\Box 59\1\ Scan335 | |
| Date | 15th March 1927 | |
| -3- Contd. which goes over and remains over, whereas we wish it to remain on contact and give full charge. This phenomenon also occurs if, while running, the charging switch is switched off and switched on again, the rise of dynamo voltage being even more rapid in this case." It was further stated that in order to ensure that full charge shall be given on running up or on switching charge off and on again, we then took the negative end of the auto switch coil to earth, i.e. we gave it the same connection as had been suggested for the voltmeter, and the coil then became, as in the case of the voltmeter, connected to the battery when the charging switch was put on. We gave reasons why this was no disadvantage from the point of view of the small current taken. It was also stated that we found no ill effect in preventing the switch to function due to the slight tendency to vibrator regulator action already referred to. In our EFC2/T15.3.27 we reported that the two auto switches running one on each of two expl. chassis,to which the change of connection had been made, were running satisfactorily, reducing the output automatically at suitable times to about half its normal peak value, unless or until the headlamps are put on and full charge is given. We reported that the slight uncertainty of operation (vibrator regulation) was not at all in evidence and that there could be very little wear on the contacts because these were bridged by a relatively low resistance. We said that there | ||